+ GUI: make LED and different knob modes available in XML-based GUIs
+ GUI: make LED and different knob modes available in XML-based GUIs

zamaudio/calf-LR4,jnetterf/calf,zamaudio/calf-LR4,adiknoth/calf,jnetterf/calf,jnetterf/calf,adiknoth/calf,jnetterf/calf,jnetterf/calf,adiknoth/calf,adiknoth/calf,zamaudio/calf-LR4,zamaudio/calf-LR4,zamaudio/calf-LR4,adiknoth/calf